Therianthropes? Lycanthropes? Animorphs? Homo-Zoological-Hybrid-Sapiens? Manimals? Take your pick.
A Magical Hat that has only enough magic to stay on its wearers head, in spite of wind, falling, or even being turned upside down. The owner, never having to pick up his hat gains an extra swagger to his step, and a small boost to charisma.